| 基于RegCM4.6的中国地区云对地表太阳辐射的影响研究 |
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| 引用本文： | 郭子嘉,刘鑫,陈勇航,辛渝,张蕾,秦艳,陈春美,刘平平,周海江.基于RegCM4.6的中国地区云对地表太阳辐射的影响研究[J].新疆气象,2020,14(6):107-113. |
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| 作者姓名： | 郭子嘉 刘鑫 陈勇航 辛渝 张蕾 秦艳 陈春美 刘平平 周海江 |
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| 作者单位： | 东华大学环境科学与工程学院,东华大学环境科学与工程学院,东华大学环境科学与工程学院,,中国气象局上海台风研究所,,东华大学环境科学与工程学院,,东华大学环境科学与工程学院 |
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| 基金项目： | 科技部国家重点研发计划(2017YFA0603502),国家自然科学(91644211、41675026、41375021) |
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| 摘 要： | 使用RegCM4.6区域气候模式，选取Emanuel和Mix（Grell+Emanuel）两种积云对流参数化方案，以2016年为例，分别对中国地区云短波辐射强迫及其涉及的物理量进行数值模拟，揭示其时空分布特征，并探究两种积云对流参数方案模拟效果的差异及其原因。结果表明：从季节平均来看，全国地表云短波辐射强迫均为负值，云对地表为冷却效应，冬季最小，春夏季较大。塔里木盆地四季均为辐射强迫低值区，夏季冷却效应最弱，辐射强迫绝对值低于40 W·m-2；全天空地表净短波辐射分布也呈显著季节差异，除夏季外均呈由南向北逐渐递减的分布趋势；晴空地表净短波辐射在横断山脉处和塔里木盆地处均比较低，其中春季最为明显；两个方案所得的季节空间分布特征大致相同，但在数值上存在差异。春季时全国大部分地区全天空地表净短波辐射通量差异最大，在55 W·m-2左右，晴空地表净短波辐射通量在青藏高原处差异在60W·m-2左右。
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| 关 键 词： | RegCM4.6 地表净短波辐射 晴空地表净短波辐射 云短波辐射强迫 |
| 收稿时间： | 2020/3/27 0:00:00 |
| 修稿时间： | 2020/7/30 0:00:00 |
Effect of Clouds on Surface Solar Radiationin China Based on RegCM4.6 |
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| Abstract: | Using RegCM4.6 regional climate model, Emanuel and Mix (Grell + Emanuel) cumulus convection parameterization schemes are used to simulate shortwave cloud radiative forcing in China in 2016. It is aimed to explore distribution characteristics and the differences in the simulation results of the two cumulus convection parameter schemes and their causes. The results show that: from the seasonal average, the shortwave radiative forcing of the surface clouds in the country is negative, and the cloud has a cooling effect on the surface. It is the smallest in winter and the larger in spring and summer. In the four seasons, the Tarim Basin is a region with low radiative forcing, and the cooling effect is the weakest in summer. The absolute value of radiative forcing is lower than 40 W·m-2. The net shortwave radiation in the clear sky is relatively low at the Hengduan Mountains and the Tarim Basin, especially in spring. The seasonal spatial distributions obtained by the two schemes are roughly the same, but there are differences in the values. The difference is most significant in spring. The difference in net shortwave radiant flux across the sky in most parts of the country is about 55 W·m-2, and the difference in net shortwave radiant flux on the clear sky is about 60 W·m-2. |
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| Keywords: | RegCM4 6 Net downward shortwave energy flux Clear-sky surface net downward shortwave flux cloud shortwave radiative forcing |
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